A helicopter on its way to an oil rig goes down with twenty workers on board. Called in to supervise the post-mortems, Professor Sam Ryan begins to piece together how the crash happened.

A helicopter on its way to an oil rig goes down with twenty workers on board. Called in to supervise the post-mortems, Professor Sam Ryan begins to piece together how the crash happened.

When archaeologists discover the remains of a body, the police call Sam in to determine how old the remains are. Sam discovers that the victim was attacked by two people, and sets out to find who they are.

When archaeologists discover the remains of a body, the police call Sam in to determine how old the remains are. Sam discovers that the victim was attacked by two people, and sets out to find who they are.

When a fire breaks out in an art centre in Cambridge, Michael Connor turns to Sam to help, who goes back to Cambridge to investigate the deaths. Twelve bodies are found, but they have trouble identifying some. As they attempt to identify Body 10, it becomes linked to an old murder case.

When a fire breaks out in an art centre in Cambridge, Michael Connor turns to Sam to help, who goes back to Cambridge to investigate the deaths. Twelve bodies are found, but they have trouble identifying some. As they attempt to identify Body 10, it becomes linked to an old murder case.